<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
    <title>跑腿APP</title>
    <!-- 公众号JSDK -->
    <script type="text/javascript" src="http://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script>
    <!-- 腾讯地图JSDK -->
    <script charset="utf-8" src="https://map.qq.com/api/js?v=2.exp&key=YOUR_KEY"></script>
  </head>
  <body>
    <div id="app"></div>
    <!-- built files will be auto injected -->
    <script>

      (function(){
        var html = document.documentElement;
        var hWidth = html.getBoundingClientRect().width;
        html.style.fontSize = hWidth/15 + "px";
      })()

    </script>
  </body>
</html>
